//The MIT License
//
//Copyright (c) 2009 nodchip
//
//Permission is hereby granted, free of charge, to any person obtaining a copy
//of this software and associated documentation files (the "Software"), to deal
//in the Software without restriction, including without limitation the rights
//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//copies of the Software, and to permit persons to whom the Software is
//furnished to do so, subject to the following conditions:
//
//The above copyright notice and this permission notice shall be included in
//all copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//THE SOFTWARE.
package tv.dyndns.kishibe.server;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import tv.dyndns.kishibe.client.chat.PanelChat;
import tv.dyndns.kishibe.client.packet.PacketChatData;

public class ChatManager {
	private final List<PacketChatData> chatDataList = new ArrayList<PacketChatData>();
	private final Object lock = new Object();

	public ChatManager() {
	}

	public void write(final PacketChatData chatData, String machineIP) {
		chatData.machineIp = machineIP;
		synchronized (lock) {
			chatDataList.add(chatData);

			final int listSize = chatDataList.size();
			chatData.resId = listSize;
			chatData.date = new Date();
			if (listSize > PanelChat.MAX_RES) {
				chatDataList.set(listSize - PanelChat.MAX_RES - 1, null);
			}
		}

		ThreadPool.getInstance().execute(new Runnable() {
			public void run() {
				CachedDatabase.getInstance().addChatLog(chatData);
			}
		});
	}

	public PacketChatData[] read(int nextArrayIndex) {
		synchronized (lock) {
			if (chatDataList.size() == nextArrayIndex) {
				return null;
			}

			final int resultSize = Math.min(PanelChat.MAX_RES, chatDataList.size() - nextArrayIndex);
			if (resultSize < 1) {
				return null;
			}

			final PacketChatData chatDatas[] = chatDataList.subList(chatDataList.size() - resultSize, chatDataList.size()).toArray(new PacketChatData[0]);

			return chatDatas;
		}
	}
}
